Machine for applying pressure to soles and shoes



May 18, 1943 F. E. STRATTON MACHINE FOR APPLYING PRESSURE TO SOLES ANDSHOES Filed July 24, 1940 'T Sheets-Sheet 1 WVEA/TU/P. M ism a; Z; 'M gMay 18, 1943 F. E. STRATTON MACHINE FOR APPLYING PRESSURE TO SOLES ANDSHOES 7 Sheets-Sheet 2 Filed July 24, I940 y 3, 1943 F. E. STRATTON2,319,274

MACHINE FO R APPLYING PRESSURE TO SOLES AND SHOES Filed July 24, 1940 7She ets-Sheet 3 ivmvrm $425M May 18, 1943 MACHINE FOR APPLYING PRESSURET0 SOLES AND SHOES F. E. STRA'ITON Filed July 24, 1940 1 Sheets-Shoot 4y 1943 F. E. s'rRAT'roN 2,319,274

MACHINE FOR APPLYING PRESSURE'TO. SOLES AND SHOES Filed July 24, 1940 7Sheets-sheaf. 6

Wvavma is/am y 13, 1943 F. E. STRATTON $319,274

MACHINE FOR APPLYING PRESSURE T0 SOLES AND SHQES Filed Jui 24, 1940 '7Sheets-Sheet 'r WVENTUR FM .2. 5M 2 1 Patented- May 18;

MACHINE FOR APPLYING PRESSURE T SOLES AND SHOES Frank E. Stratton,Beverly, Masa, assignor to United Shoe MachineryCorporation, Borough ofFlemlngton, N. 1., a corporation or New Jersey Application July 24,1940, Serial No. 347,174

89 Claims. (01. 12-37) This invention relates to machines for use inapplying pressure to shoe bottoms such, for example, as machines forcement attaching soles to shoes. The invention is illustrated, by way ofexample, as embodied in a turret type machine adapted for use inapplying either sole laying or sole attaching pressure to shoe bottoms,the machine being provided with a plurality of work receiving unitswhich consist of pads arranged for the reception of soles and shoes.

It is an object oi. this invention to provide an improved means forintermittently operating the conveyor, which in the illustrated machineconsists of the rotatable turret, and controls for said means. Asillustrated, the improved operating means consists oi. a multicylinderfluid motor which is arranged to move with the turret and intermittentlyto rotate the turretsuccessively to bring the pads to a loading station.The operation of the fluid motor is re I ated by a control device whichis arranged to control the. exhaust of pressure fluid imm the differentcylinders of the motor, and, as a further aspect of this i'eature oi theinvention, the control device is also arranged to admit pressurefluid'to the cylinders in the exhaust position while the turret s atrest so as to equalize the pressure in all the cylinders at this timeand render the motor inoperative.

It is a further object of this invention to provide an improved meansfor initiating the operation of the conveyor. To this end, the controldevice for the motor which operates the turret is coupled with the padat the loading station by mechanism which urges the control devicetoward the motor operating position when a sole and shoe are pressedagainst the pad at the loading station. As illustrated, the controldevice comprises a shiitable member which is urged toward a motoroperating position by a pressure-responsive member which is in turncoupled with a pressure-applying system associated with the pad at.

the loading station. In accordance with one emhodiment of this featureof the invention, regulating means are provided for thepressure-responsive member and are arranged to prevent the operation ofthe pressure-responsive member until the pressure on the sole and shoeon the padbe arranged to urge the control device toward.

- hydraulic system for operating the machine.

in the high-pressure system reaches a predetermined level. I

In the illustrated machine, the work is pressed against the pads bymeans including a piston having a small sectionand a large section whichare received respectively in a small chamber which is connected to asource of pressure fluid, and a large chamber which is supplied withpressure fluid from the small chamber. Upon the release of the pressureacting on the piston, the pressure fluid in the large chamber normallyescapes through an escape port in the large chamber which is uncoveredat that time by a springoperated valve. In accordance with another fea-"ure of this invention, further means are provided for permitting theescape of the pressure fluid from the large chamber in the event thatthe spring-back valve fails to uncover the escape port when thepressureis reduced. As illustrated, this means consists of a passagewayarranged to permit the escape of the pressure fluid from the largechamber, and a valve located in that passageway and arranged to open inthe event that the spring-operated valve fails to uncover the escapeport.

Invention is also to be recognized in the means for automaticallydisconnecting the operating 1ever from the fluid motor control valveduring the rotation of the turret thereby to permit the valve to moveindependently of the operating lever and stop the movement of the turretat a predetermined time regardless of whether or not the operating leverhas been returned to its inoperative position; in the arrangement of thefluid-operated means for controlling the sole and shoe locating gagesand for biasing the shoe engaging members towards an operative positionafter the sole and shoe have been properly located by the gages; in theguiding means for causing the pistons which apply pressure to the soleand shoe to move in a predetermined path; and in the control means forregulating the operationof the valve which controls the flow ofpressurefluid to the piston which qforces the sole and shoe against the pad.

With the above and other objectsin view, the

invention will now be described in connection with the accompanyingdrawings and thereafter pointed out in the claims.

In the drawings,

Fig. 1 is a perspective view of a machine embodying this invention;

Fig. 2 is a vertical section through the machine chine taken on lineII-II of Fig. 5, some of the parts being broken away to show details ofthe underlying structure;

Fig. 3 is. a vertical section taken substantially along the line III-IIIof Fig. 2 looking in the direction of the arrows, the indexing controlmechanism being omitted;

Fig. 4 is a view on an enlarged scale of a typical rotary valve used forcontrolling the indexing and gage operating systems;

Fig. 5 is a horizontal section through the machine taken on line V-V ofFig. 2 looking in the direction of the arrows;

Fig. 6 is a vertical section on an enlarged scale taken along the lineVIVI of Fig. 5 looking in the direction of the arrows;

Fig. 7 is an angular view on an enlarged scale of the indexing valvecontrol mechanism shown in the lower right portion of Fig. 5;

Fig. 8 is a vertical section on an enlarged scale taken along lineVlJI--VIII of Fig. 5 looking in the direction of the arrows;

Fig. 9 is an elevation of the opposite end of the valve constructionshown in Fig. 8;

Fig. 10 is a diagrammatic illustration of the hydraulic system embodiedin the illustrated machine, the sections V.-V, XIIX]I and XIII-XIIIbeing taken along similarly designated lines in Fig. 2 and showing thepost turned 90 in a clockwise direction from its position in Fig. 5;while section XIV-X[V is taken along the line of that designation inFig. '7, and sections XVXV, XVI-XVI, XVIIXVII, and XVIII-XVIH- are takenalong lines of those designations in Fig. 5; and

Fig. 11 is a section taken along line XI-XI of Fig. 2 looking in thedirection of the arrows.

Before describing the machine in'detail a brief description will begiven of its operation. The operator first places an unattached sole onthe pad and) then depresses the left treadle I10 which causes the solelocating mechanism accurately to position the sole on the pad. Theoperator next places a shoe on the sole, locating it with the aid of thegages and then moves a pair of balls 10 over the shoe and depresses theright treadle 360 which causes the balls to press the shoe into the pad.As the shoe is pressed into the pad'the locating mechanism isautomatically moved away from both the sole and the shoe. The operatornow indexes the machine by depressing a hand lever 350 which causes theturret head to rotate through 90 and bring the next pad to the loadingstation. As the next pad moves toward the loading station the pressurefluid, which causes the bails to press the shoe into the pad, isautomatically released and the bails are raised from the shoe so thatthe operator can remove it. from the pad imme-' diately after thepadreaches the loading station and repeat the loading operation describedabove.

The illustrated machine comprises a circular base In (Fig. 2) having anupstanding wall I! which forms a supply tank or reservoir for thepressure fluid, preferably 011, used in the operation of the machine.Projecting from the central portion of the base is a raised platform l4to which a post I6 is secured by bolts I. The

platform is provided with openings IS in its side der formed in thelower part of the post while above the treadles.

the upper end of the column is positioned with respect to the post by aroller bearing 26 which is seated on a shoulder formed on the postadjacent to its upper end. The column 22 is made up of a lower part 28which is constructed to function as a manifold and to control theoperation of the machine in a manner which will hereinafter bedescribed, and an upper portion 30 which depends from the head 20 and isfastened to the manifold by bolts 32.

The head 20 has formed therein four radially extending recesses 33located 90 apart, which are normally covered by plates (Fig. 1). Mountedin the recesses 33 are a like number of cylinders 34, 36, 38, 40 (Fig.10) of a fiuidoperated motor which rotates the turret successively tobring the pad boxes to the loading station which is in the front of themachine In the cylinders are pistons 42 (Fig. 2) which are connected byconnecting rods 44, 46,48 and 50 (Fig. 10) to a collar 52 which isrotatably mounted on a stationary pin 54. The pin 54 is locatedeccentrically of the center of the fixed post [6 and is mounted on acollar 56 which is fastened to the post by a key 58. The turret isrotated by successively exhausting two of the cylinders, allowing theother two cylinders to rotate the turret by pushing against the fixedpin 54. The mechanism for controlling the operation of the fluid motorwill subsequently be fully described.

Mounted on the turret head between the cylinder receiving recesses arefour pad boxes 64 (only one of which is shown in Fig. 1 for sake ofclarity) which are successively brought to the loading station oppositethe tray 62 (Fig. l) by the rotation of the turret. The pad boxes areprovided with pads 65 which are preferably of the type disclosed inLetters Patent of the United States No. 2,205,400, granted June 25,1940, on anapplication filed in the name of Sidney J. Finn, while theshoe and sole locating mechanism is of the type disclosed in LettersPatent of the United States No. 2,262,759, granted November 18, 1941, onan application filed in the name of Sidney J. Finn.

The construction of the shoe pressing means associated with each pad isthe same, so only a typical construction such as is shown in Figs. 2

and 3 will be described. When a shoe and a sole are properly located onthe pad 65 at the loading station, the shoe is pressed into the padbymembers 66, 88 (Figs. 1 and 3) which engage, respectively, the top ofthe cone of the last and the forepart of the shoe. The members aremounted on heightwise movable bails each consisting of a crosshead I0and apair of downwardlyextending pivoted arms 12, 14 located on oppositesides of the pad. The bails are connected with each other by racks 16which are fastened to the inner arms 12 and mesh with a pinion I8, sothat movement of one of the balls is transmitted to the other and causesan equal and opposite movement of the other bail. The arms 14 on theside of the pad a sole and a shoe on the pad. The upper ends of thebails are urged. away from each other, by springs 88 (Fig. 3) which areconnected to the lower ends of the arms below their pivots.

When a shoe has been properly located on the pad, it is pushed againstthe pad by, a piston 82 (Figs. 2 and 3) located in a cylinder 84 whichis fastened to the turret head beneath the pad. The piston is connectedto the lower ends of the bail arms 12, I4 by equalizing levers 86 whichare fastened intermediate their ends toa shaft 88 and at their oppositeends rotatably receive rods 89 which 'are fastened to the bail arms. Theshaft 88 is mounted in alined openings 89 formed in spaced ears 98depending from a plate 92 which is bolted to a shoulder 94 that extendsinwardly from the skirt portion of the piston 82. Located centrally ofthe plate 92 is a segment 96 having a downwardly facing wedge-shapedsurface which lies between the sides of a complementally shaped grooveformed on the periphery of a segment 98 keyed to the shaft 88. Thealined openings 89 in the flanges 98 are larger in cross section thanthe shaft 88, and the shaft is normally held against the bottom surfacesof those openings by a pair of spring-backed plungers I88 (Fig. 2)slidably mounted in'openings formed in the upper portions of the ears90; the plungers acting on the equalizing levers 86 which are mounted onthe ends of the shaft 88. While the shaft is held in the bottom of theopenings 89, the members 95 and 98 are separated, as shown in Fig. 2. sothat the shaft 88 can rock back and forth. Thus. when the bails aremoved downwardly. the member 66 or 68 which first engages the shoe willrock 'the shaft 88 until the other member engages the shoe with an equalpressure. After ths initial equalizing adjustment, the springs whichback the plungers I88 yield, allowing the wedging surfaces on themembers 96, 98 to contact each other and lock the bails to the pistonduring the period b when substantial pressure is applied to the shoe.

The piston 82 is, broadlv, of the quick-acting type disclosed in LettersPatent of the United States No. 2,231,963,- granted February 18, 1941,on an application filed in the name of Frank E. Stratton. This pistonhas a head I82 (Fig. 3) located in a small chamber I84 and a lowershoulder I 86 having a relatively large pressure receiving area locatedin a large chamber I88. It will-be noted in passing that two separatepistons arranged in the manner disclosed in the above-mentioned Strattonpatent can be used in the place of the single shouldered pistondisclosed herein. Thepiston is forced downwardly in the cylinder by thedelivery of pressure fluid through a pipe I85 to the relatively smallchamber I84. The pressure fluid is supplied by a rotary pump I58 (Fig.5) which draws the fluid from the reservoir through a strainer I52 and apipe I54 and forces it through a pipe I56 to a rotary valve I 58. Fromthe valve the fluid 'is led through a pipe I68 to a riser pipe I62 (Fig.2) in the stationary post I6, whence it passes through a port I64 to achamber I66 (Fig. in the upper part of the manifold and out through thepipe I85.

The chamber I84 is quickly flllediafter which the pressure fluid rapidlyforces the piston downwardly until the members 66, 68 engage the shoe.As the piston is moved downwardly, the displacement of its shoulder I86causes fluid to be drawn up from the reservoir, through a pipe H8 in thepost I6 (Fig. 2), a manifold opening H2, and a pipe II4 which opens ontoa port I I8 (Fig. 3) in a I head portion I82 of the piston will havemoved down far enough to uncover a passage I28, al-' lowing the pressurefluid to flow from the small chamber I84 into the passage and to act ona sleeve valve I22 which is held by a backing spring I24 against a portthat opens onto the large chamber I88. When the pressure builds upsufficiently to overcome the backing spring I24, the valve I22 is moveddownwardly until it seals the port leading into the passageway H8, atwhich time openings I 26 in the valve sleeve are uncoveredin the chamberI88, allowing the pressure fluid to flow into the chamber I88 and buildup pressure there which will act on the shoulder I86 of the large pistonas well as on the small piston I02 and force the shoe into the pad.

After being loaded, the pad rotates with the turret head I2 until itagain nears the loading station, when the pressure fluid acting on thepiston 82 is released, at which time the piston is ra sed to move thebails away from the shoe by the action of a pair of heavy springs I28Fig. 2) which are connected respectively to the turret head and to theends of a bar I38 mounted in the lower portion of the flanges 98. Whenthe pressure in the chamber I88 is reduced the spring I24 ra ses thevalve I22 and uncovers the passageway II8 allowing the fluid in thechamber I88 to escape rapidly down that passageway so that it operatedupon, while it may be only slightlycracked when a very largev shoe orone of an extremely high heeled style is operated upon. In the lattercases, it has been found that, occasionally, when the pressure fluid isreleased." from the cylinder, the heavy springs I28 raise the piston sorapidly that the passage I28 is closed before the backing, spring I24can lift the valve I22 from its seat and permit-the fluid in the chamberI88 to escape through the passage II8, with the result that the fluid inthe chamber I88 is trapped there and prevents further upward movement ofthe bails. This difliculty is overcome by providing the piston I82 swith a passage I31 (Fig. 3) which connects the chamber I88 to thechamber I84. The passage is sealed against thedownward passage of fluidfrom the chamber I84 by a, ball valve I 38. Thus, in the event thatpressure fluid is trapped in the chamber I88 after the pressure has beenreleased from the chamber I84, the upward pressure of I38 lifts it fromits seat, allowing the pressure fluid in the chamber I88 to escapethrough the passage I31 until the pressure in the chamber I88 has beenreduced sufficiently to permit the spring I24. to raise the valve I22and allow the remaining fluid to escape down the passage H8.

The piston is guided in its heightwise movement by a depending plate I32(Fig. 2) having an elongated slot I34 in which slides one end of the barI30. The guide plate I32 prevents rotation of the piston which wouldotherwise cause the bail arms 12, 14 to bind against the sides of theslots I36 in the turret head through which they move.

When the bails are in their inoperative positions (Fig. 3), that is,when they are moved away from each other so as to uncover the pad, themembers 66, 68 overlie the gage mechanism, and if the piston wereaccidentally operated to its full extent at this time, the members wouldbe forced downwardly against the gage mechanism and might causeconsiderable damage. To prevent this, the bail arms are provided withlugs I39 which lie above the surface of the turret head when the bailsare in their up position (Fig. 1), and when the balls are in theirinoperative position, lie slightly above shoulders I40 which surroundthe rear parts of the slots I 36.

If the pressure fluid is accidentally admitted to the chamber I04 whenthe bails are in this position, the lugs I39 will strike the shouldersI40 and will stop the downward movement of the piston before the smallhead I02 uncovers the passage I20. As the force exerted by the pressurefluid on the small head I02 is relatively small, the lugs will hold thepiston in this position until the pressure fluid is released from thecylinder. Another advantage of this feature lies in the fact that itenables the operator to send one or more of the pads around the machineempty, as all that he need do to operate the machine in this manner isto make sure that the balls are in their inoperative positions, admitfluid to the chamber I04 so as to move the pins I39 into engagement withthe shoulders I40, and then index the machine to bring the next pad tothe loading station,

The forward portions of the slots I36, that is, the portions of theslots which underlie the lugs I39 when the bails are moved to a positionwhere .they overlie the shoe, are made enough wider than the openings inthe rear portions or the slots which are surrounded by the shoulders I40so that the lugs I39 can readily pass through the slots when the ballsare moved downwardly to press a shoe against the pad.

When a sole is placed on the pad 64 at the loading. station, it ispositioned thereon by locating mechanism of the type described in theabove-mentioned Finn Patent No. 2,262,759, which is operated by thetreadle I10 through a control system which will now be described. Thetreadle is connected to a valve operating pawl I14 (Fig. 6) by a rod I12which extends through an open ended --pipe I16 threaded into an openingin the bottom of the reservoir and through an opening in the underlyingtreadle; the portion of the rod extending below the treadle havingclamped thereona collar I13 which normally engages the underside of thetreadle. The upper end or the rod is located between a pair of spacedarms I18 that extend rearwardly from a sleeve I19 (Figs. and 6) which isrotatably mounted on the stem I80 of the rotary plug in the valve I16,while the pawl I14 is located between the valve casing and the adjacentarm I18. The pawl I14 and the position shown in Fig. 6 by a sprin I82which urges an oppositely located forwardly extending arm I18 on thesleeve I19 downwardly against an adjustable stop screw-I98 threaded intoa flange I99 that projects inwardly from the wall I2.

The tooth I88 of the pawl I14 is normally seated in the uppermost offour equally spaced notches I8I in the periphery of a-collar I82 whichis keyed to the valve stem I80, the tooth being urged into the notch bya spring I94 which is connected at one end to, the toothed portion ofthe pawl and at its other end to a pin I96 on the sleeve I19. The pawltooth I88 has parallel front and rear surfaces which engage against theopposite side of the notches in which it is seated and forms a positivetwo-way connection with the collar which enables the operator partly toopen and to close the valve to adjust the sole locating mechanism whilehe is positioning a shoe on the pad.

When the treadle I10 is fully depressed the pawl I14 'is rotated in acounterclockwise direction as viewed in Fig. 6 and moves the valve plugwith it to its fully open position. Near the end of the downwardmovement of the treadle a tail I84 of the-pawl strikes a pawl liftingstud I86, and as the treadle continues downwardly to the limit of itsmovement, the stud I86 causes the pawl tooth I 88 to lift out of thenotch in which it is seated until a beveled surface on the. pawl toothlies above the surface of the collar I82, at which time a spring-pressedplunger I90 located beneath the collar enters one of the notches I80which moves opposite to it at this time and yieldingly resists furthermovement of the collar. When the treadle is released, a spring I92connected to the arm I18 rotates the sleeve I19 in a clockwisedirection, as viewed in Fig. 6, thereby causing the beveled surface onthe pawl tooth I88 to ride up on the side of the notch until the pawltooth'rests on the periphery of the collar I82 and then to move with thecollar until the tooth drops into the next notch; the pawl tooth beingheld against the periphery of the collar during its movement betweennotches by the spring I94.

The upward limit of movement of the treadle I10 is determined byengagement of a boss 200 on the upper side of the treadle with the underside rod I12 are connected to the arms I18 by a pin of the base, whileits lower limit of movementis determined by the engagement of a collar202 on. the rod I12 with a plate 204 seated on the upper end of the pipeI16, the treadle normally being held in its upper position by a spring206.

When the valve I16 is moved to its inlet position by the treadle, itadmits pressure fluid to a chamber 208 in a cylinder 209 (Figs. 3 and10), where the fluid acts against the under side of a plunger 2I0, andraises the plunger against the resistance of aspring 2I2 until a sleeve2 connected to the lower end of the plunger strikes against the lowerend of the cylinder 209. The pressure fluid is supplied by the pump Iand passes through the pipes I56 and 2I6 (Figs. 5 and 10) to'a pressurecontrol valve 2I8 whence it flows through a pipe 220 to a secondpressure control valve 222 and then through pipes 224, 228, and 228 tothe valve I16 and from there through a pipe 230 to the chamber 288. Ifdes red, the pressure control valves 2" and 222 and also 444, which willbe hereinafter referred to, maybe similar to the pressure control valveI010 described inthe United States Letters Patent No. 2,047,185, issuedJuly 14, 1936, on an application flied by Ballard et al.

When the plunger 2I8 is raised by the action of the pressure fluid, iton cm 232 mg. s)

which forms partof the operating linkage of the gagingmechanismassociated with the pad box at the loading statlonfand which overliesthe plunger while the pa'd'box'isat that station. The upper end of therod 232 is connectedto abell-crank lever 234 which is in turnconnectedto a bar 233 that corresponds to the bar I66 in the disclosure of thebeforementioned Finn Patent No. 2,262,759. Upward movement of the-rod232 rotates the lever 234 in a clockwise direction and moves the bar236' to the right, as viewed-in Fig.

lever and passes through an opening. in a plate- 242 which is in turnconnected with the arm 12 of the .left bail by members 244, 246. Theforce exerted by the compressed spring 238 on the plate 242 is nearlystrong enoughto cause the bails to move toward each other so that theoperator is materially assisted in moving them to aposition above a shoeon the pad.

The locating mechanism is automatically released from the sole and theshoe after they have been pressed firmly into the pad. The release of.the locating mechanism is effected by the depression of a plunger 256in a chamber 249 which is connected to the chamber I68 by a passage 248,the plunger being forced downwardly when the pressure of the fluid inthese chambers buildsup .sufliciently to overcome a backing spring 252This,-of course,

which-surrounds the plunger. takes place after the piston 82 has beenforced down far enough to uncover the passageway I26 and the pressurehas built up in the. chamber M8.

The downwardly moving plunger strikes'the head 254 (Figs. 3 and 6) ofthe treadle rod I12 and moves'the latter downwardly, causing the valveI16 to rotate to its next position, where the chamber 268 and the pipe236 are connected to an ex-. haust pipe 23I which discharges into thereservoir (Figs. 6 and 16). The spring 2 I 2 which surrounds the plunger2I6 will then move that member downwardly, allowing a spring 256 (Fig.3) to rotate the lever 234 in a counterclockwise direction and move thelocating mechanism to its inoperative position. As the lower end of therod I12 is slidable in an opening in the treadle I16, downward movementof the rod caused by the action of the plunger 256 will not disturb thetreadle.

There is a possibility that the lower ends of the plunger 256 and therod 232 will be bent or broken when the turret is rotated to move a padaway from and back to the loading station due to the fact that the lowerend of the plunger is pressed against the head 2540f the rod I12 whenthe pad moves away from the loading station, and when it moves back tothe loading station the lower end of the rod 232 will strike against thehead of the plunger 2I6 if the plunger has not fully returned to itsdown position. Accordingly, both the plunger 256 and the rod 232 havebeen made in two parts which are connected by a spring-closed hingedjoint 258 which permits them to break when their lateral movement isresisted.

The rotary valve I58 which controls the flow of pressure fluid to thecylinder 84 is constructed to operate both as an inlet or supply valveand as an outlet or exhaust-valve and is'operated by two independentcontrol systems. The first of these control systems, considered in thesequence of properly located on the pad and moves the valve I58 to itsinlet position where it admfis pressure their operation, is operated bythe treadle 266 which is depressed when a sole and a shoe are fluid tothe cylinder 84 which causes the shoe to be pressed into the pad. Jhesecond control system moves the valve I58 to its exhaust position and issequentially operated by each of four cams 264 (Fi 5) which are mountedon the manifold 10' The operation of the second system takes place as 28in predetermined relation to the fourpads.

the diflerent pads return to the loading station after having movedaround the turret and eifects the release of the pressure fluid from thecylinder associated with the returning pad so that the attached. shoeand sole can readily be removed from the pad.

The first control system for operating the valve 3 I58 consists of apawl 266 (Figs; 5 and 8) having a tooth 268 which is successively seatedin six equally spaced square notches 216 formed in a collar 212 which iskeyed to thestem 214 of the plug in the valve I58. Rotatably'mounted onthe stem 214 (Fig. 8) is a sleeve 216 having two ,spaced rearwardlyextending-arms 218 which receive between them a treadle rod 286. Thepawl 266 is located between the valve I58 and the adjacent arm 218, andboth the treadle rod and the pawl are, connectedto the arms 218 by atransversely extending pin 282. The arms 218 are held in their upposition shown in Fig. 8 by a spring 364 which is connected to aforwardly extending arm 284 on the sleeve 216 and holds that arm againstan adjustable stop screw 286 mounted on the flange I99. The treadleprod286 extends through an open ended pipe 296 '(Fig. 8) to a point belowthe bottom of the reservoir (Fig. 2) where itis connected to the treadle266 by a coupling similar to that disclosed in Fig. 7. The treadle isnormally held against the under side of the reservoir by a spring 292,and its lower limit of movement is determined by the engagement betweena collar 284 on the rod 286 and a plate 296 a mounted on the top of thepipe 296.,

Whenthe treadle 266 is depressed the plug in the valve I58 is rotated bythe. pawl 266 and as the treadle nears its lower limit of movement thepawl tooth 268 is lifted out of the notch 216, in

which it is seated by the engagement between vscrew 286.- As spring 366,which is connected to the pawl and to a pin, 368 on the sleeve 216,causes the pawl tooth 268 to ride over the surface of the collar 212, asit moves with the sleeve until'it drops into the next notch 216. It willbe noted that the pawl tooth 268, like the pawl tooth I88. has paralledfront and rear surfaces. These surfaces form a positive two-Wayconnection with the collar 212 until the pawl is lifted out of the notchin which it is seated by the stud 366, thus making-it possible for theoperator to raise and lower the bails 16 as he adjusts a shoe on thepad.

When the loaded pad again approaches the loading station after havingmoved about the turret, the plug in the valve I 58 is rotated, by

' other arm ofthe bell-crank lever 3m is provided with a roller 3 (Fig.5) which is located in the path of rotation of-the cams 264 when thevalve operating pawl 266 is in its upper position, shown in Fig. 8, sothat the cam 2'64 associated with the pad that is moving to the loadingstation will strike the roller 3 and cause the lever 3i6 to rotate in aclockwise direction, as viewed in Fig. 5, and move the plug in the valveI58 to its exhaust position.

A safety mechanism is applied to the valve I56 which permits an inletpassage of the valve to be opened and closed thereby to move the bails16 up and down as the operator adjusts the shoe on the pad but which,once pressure has been fully applied to the pad, requires the operatorfully to release the bails by moving the valve all the way to itsexhaust position before pressure can again be applied to the shoe. Thismechanism takes care of the situation which occasionally arises when anoperator. after fully applying pressure to the shoe and taking his footfrom the treadle 263, sees that the shoe is improperly adjusted andpartly depresses the treadle a second time to raise the balls so that hecan correct the adjustment of the shoe. It has been found that when theoperator partly depresses the treadle Each of the valves I66 and "6(Fig. 5) is provided with a cylindrical plug of the type illustrated inFigs. 4 and 10. This plug has three equally spaced slots 324 which aresuccessively moved to inlet and exhaust positions. As one of these slotsis always in register-with the pipe supplying pressure fluid, theregistering slot will a be filled with the pressure fluid which forcesthe 324 will be counteracted by the reaction of the the second time toraise the bails so that he can adjust the shoe he has a tendency toforget that the pawl 266 is positively connected to the collar 212 atthis time and that the bails will again move downwardly when he lets thetreadle rise, and he sometimes removes his foot from the treadle,thereby endangering his hand which has taken hold of the shoe.

The safety mechanism consists of a collar 3" (Figs. 5 and 9) pinned to avalve plug spindle 3l3 which projects from the left side of the valveI63, and a pawl 326 which co-operates with ratchet teeth 322 formed inspaced sections of the periphery of the collar M6. The ratchetedsections 322 correspond to the location of the slots 324 (Figs. 4 and10) in the valve plug when positioned to exhaust the pressure fluid fromthe cylinder 84 and the smooth surfaces 326 on the collar 3i6 whichextend between the ratcheted portions correspond to the inlet positionsof the slots 324 when they connect the cylinder 64 with the pump I66.Thus, when the treadle 266 is depressed to move one of the slots 324 inthe plug of the valve I53 to an inlet position, the tooth of the pawl326 will ride over one of the smooth surfaces 326 so that the operatorcan raise and lower the treadle to control the bails while he isadjusting the shoe. However, once the treadle has been fully depressedand the slot moved all the way into its inlet position, the pawl toothwill drop into the flrst notch of the ratchet 322 so that the valve plugmust be moved to its full exhaust position before the pawl tooth meetsthe next smooth surface 326, which permits the operator to again movethe valve to its inlet position. The tooth of the pawl 326 is heldagainst the surface of the collar 3I6 at all times by a spring 323 whichis fastened at one end to the pawl and at its other end to the valvecasing.

pressure fluid in the pockets formed by the slots 332.

I The turret is rotated by a fluid motor which is operated by pressurefluid from the pump I66 (Fig. 10) which flows from the pressure controlvalve 222, through the pipes 224, 334 to a riser pipe 336 in thestationary post l6. thence out through a port 333 and arecess 346 in thepost to manifold chambers 342 which are connected to pipes 344 that leadtothe cylinders of the fluid motor which are in propelling position. Thechambers 342 in the manifold are separated by partitions 346 that slideover the surface of the post. Therecess 346 in the post is suflicientlylong so that it extends beyond the sides of the partition 346 which liesopposite to the port 333 and opens into the chambers 342 on both sidesof that partition. The two chambers 342, which are connected to thecylinders in exhaust position, are connected by a recess 346 in the postto a riser pipe 343, thence to a pipe 362 which opens into a chamber 354in a valve casing 366. Also opening into the chamber 334 is a pipe 333which is connected through the pipes 226, 224 to the pressure controlvalve 222.

Operation of the fluid motor is controlled by a slide valve 366 (Fla. 2)which regulates the escape of the pressure fluid from the cylinders inthe exhaust position and also functions as an index pin.

The valve is mounted for reciprocation in the valve casing 366 fromwhich it projects at both ends. The end 362 ofthe slide valve adjacentto the manifold 23 functions as the indexing pin and is provided with aroller 364 which is normally seated in one of four recesses 366 (Fig. 5)spaced degrees apart in a cam 366 which is fastened to a shoulder 363 onthe lower portion of the manifold by bolts 3" (Fig.2). The bore in thevalve casing 366 is of different diameters, the section adjacent to themanifold being of greater diameter than the section in the opposite end.The mid-portion of the bore contains two spaced circumferential grooveswhich open onto the pipes at: and m, and the bore between these groovesis of the same diameter as the larger section of the bore adjacent tothe manifold. The slide valve m is constructed with a shoulder 312 of adiameter to make a sliding flt in the end of the valve casing adjacentto the manifold 23 and a smaller shoulder 314 of a diameter which iscomplemental to the smaller opening in the opposite end of the casing.As the shoulder 312 is larger incross section than the shoulder 316, thepressure fluid in the mid-portion of the cusing forces the slide valveto the right, as viewed in Figs. 2 and 10, and keeps the roller 364 inengagement with the cam 366 while the turret is rotating and seated inthe bottom of one of the recesses 366 while the turret is at rest. Theportion of the slide valve between the shoulders 312 and 314 which islocated between the grooves in the valve casing when the roller 364 isseated in the recess 366 is of reduced diameter so that the passage orchamber 354 connects the pipes 352 and 356 at this time.

Rotation of the turret is initiated by a hand lever 356 (Figs. 2 and 7)which withdraws the slide valve 366 part way from the recess 366 inwhich it is seated to a position where the roller 364 lies opposite toan inclined surface 316 (Fig.

) on the indexing cam 368. When the slide valve reaches this position,the shoulder 312 will be displaced sufficiently to the left, as viewedin by the pistons in the driving position and tend to freeze the rollerin the recess. a The hand lever .366 which operates the slid valve-366is mounted in a socket 395 formed on a sleeve 396 (Figs. 2 and 7) whichis pinned to one end of a shaft 391 mountedln a bearing 396 attached toa bracket 399 that is fastened to the top of a partition 466 whichprojects up from the base I6. Thepartition is located in the frontportion of the base below the loading station, where it forms a supportfor the slide valve. and

elements of the slide valve operating mechanism.

Pinned to the opposite end of the shaft 391 adja cent to the'end of thebearing 396 opposite to 'the sleeve 396 is a crank arm 46!, androtatable on that end of the shaft is a forked arm 462 Fig. 10, to closethe central part of the chamber 354, thus shutting off the pressurefluid from the cylinders 36, 36 which are in the exhaust position whenthe cylinders are located as shown in Fig. 10, and at the same time theshoulder 312 will have slightly uncovered the port 313 leading to thepipe 352 which allows the pressure fluid in the cylinders'36, 38 toescape through the pipe 352, past a reduced portion 318 of the slidevalve 366, and then through a discharge pipe 366 into'the reservoir. Theescape of the pressure fluid from the cylinders 36, 36 permits'thecylinders 34,46

which are in the driving position to rotate the turret head and thisrotation carries the inclined surface 316 of the cam 366 beneath theroller 364, forcing the slide valve 366 still further to the left, asviewed in Fig. 10, until the port 313 leading to the pipe 352 is fullyuncovered. When the slide is in this position, the pressure fluid canescape most rapidly from the cylinders 36, 36 and the turret will rotateat its maximum speed.

As the pad to the left of the loading station approaches the loadingstation, an inwardly sloped surface 362 on the indexing cam 366 movesbeneath the roller 364, and allows the slide 366 to move to the right,as viewed in Fig. 10,

untilthe roller 364 reaches a relatively flat surface 364 on theindexing cam, when the slide valve will have moved to the right to aposition where an opening 366 in the shoulder 312 is located in thegroove opening onto the pipe 352 which allows the pressure fluid toescape from the exhausting cylinders. nected through a small passageway368 .in the slide valve to a second opening 396 which at this time willbe in register with a port 39l leading to an orifice plate 392 whichopens onto a pipe 394 that discharges back into the reservoir. The restricted openings in the passageway 388 and the orifice plate 392 reducethe flow of fluid from the exhausting cylinders, thereby reducing thespeed of rotation of the turret to a point where it is .barely moving.This movement is stopped alto gether when the roller 364 drops into thenext recess 366 when the slide valve moves to the position shown in Fig.10 where the shoulder 312 prevents further escape of fluid from theexhaust cylinders.

When the turret is'at rest the roller 364 is seated in one of therecesses 366 and the slide valve shoulder 312 is in the position shownin Fig. 10 where the pipe 358 is connected to the pipe 352 by thechamber 354 so that the pressure fluid can flow through the chamber 354to the cylinders 36, 38 in exhaust position. Thus, equal pressure isapplied to all the pistons in the fluid motor at this time, therebyeliminating the rotational force which would otherwise be exerted Theopening 386 is conwhich is connected to the stem of the slide valve 366by: a pin 463 that is seated in the fork in the arm 462. The crank arm46l is connected to the forked arm 462 by a latch 464 which hooks over apin 466 that extends laterally from the arm 462. When the hand lever 356isoperated, the

latch 464 causes the arm 462 to move with the crank arm 46! and towithdraw the slide valve 366 a sufllcientdlstance from the cam 366 tore- -move it from the recess 366 and crack theport 313 (Fig. 10) leadingto the exhaust cylinders, thereby initiating the rotating of the turret.As the turret rotates, the cam surface 316 moves the slide valve 366further to the left, as viewed in Fig. 7, causing the forked arm 462 tomove relatively to the crank arm 46! and the pin 466 to'ride beneath ashoulder 466 on the latch and lift the same. When the latch is liftedsufficiently for its hooked end to clear the pin 466, a pivoted stop 6mounted on the crank arm 46! is moved beneath a shoulder 4 on the latch464 by a spring 2 and holds the latch in its raised position. Thus, theslide valve is free to move inwardly in response to the unbalancedpressure upon it away from the arm I as the contour of the cam 368changes and stop the turret-after a quarter of a revolution even if thehand lever 356 is held down by the operator. When the hand lever isallowed to return to its up position (Figs. 2 and '7), an abutment screw6 strikes the lower end of the stop 6 and knocks it out from beneath'theshoulder 4, allowing the spring 2 to pull the latch 464 down intoengagement with the pin 466. Downward movement of the hand lever 356 islimited by a stop screw 426 mounted on a' plate 422 which projectslaterally from the sleeve 396 while return movement of the hand lever356 (Fig. 7) is limited by a second abutment screw 6 which engages ashoulder M9 on the crank arm MI. The lever 356 is held in its upposition by a spring 42l which is located between the base I6 and theplate 422 where it urges the sleeve 396 in a clockwise direction andholds the shoulder 419 against the screw 4 I 8.

Withdrawal of the slide valve 366 by the hand lever 356 is resisted bythe 'force exerted by the pressure fluid on the slide valve shoulder 312which tends to keep the end of the valve seated in one of the recesses366. This resistance is largely overcome when the shoe ispresesd intothe pad by the action of a piston 424 (Fig. 10)

which is mounted in a cylinder 426 (Fig. 7) that depress the hand lever350. Pressure fluid is conducted to the cylinder 426 (Fig. 10) by a pipe.7, and move the slide valve away from the cam 368. The assistancerendered by the piston 424 is controlled by the adjustment of a backingspring 438 in the valve 434 which yields when the pressure builds upsufficiently to overcome the resistance-of the spring and allows a plug445 in the valve to move to the left and to close the port leading tothe pipe 436, thereby preventi g the passage of additional fluid throughthe valve. Movement of the valve 365 to the start n position can be madefully automatic by using a spring 438 of sufllcient strength to preventthe movement of the plug 455 under pressures great enough to move thepiston 424 to the left and cause the withdrawal of the valve from therecess 366 in which it is seated.

If desired, starting of the illustrated machine can be made fullyautomatic and be caused to take place only when a predetermined pressurehas been applied to a shoe. This can be accomplished by by-passing thevalve 434 with a pipe 442 and connecting into that pipe a pressurecontrol valve 444 which can be set to open and permit the passage ofpressure fluid to the cylinder 426 only when the pressure has been builtup to a predetermined point. 446 may be provided so that the indexingmechanism can selectively be operated either by the manual control orunder the automatic control just described.

The hydraulic apparatus in the illustrated ma chine includes ahigh-pressure system and a lowpressure system, both of which aresupplied with pressure fluid by the pump I58. The high-pressure systemis utilized to apply pressure to the shoe and to assist in the operationof the indexing mechanism, while the low pressure system is used tooperate the fluid motor and the sole locating mechanism. Pressure in thehigh-pressure system is usually between 150 pounds per square inch and250 pounds per square inch, depending upon the work operated upon, andis regulated by the pressure control valve 2I8 (Fig. 10) which isadjusted by a manually operated control 2I6 (Figs. 1 and 5), thepressure being .indicated by a conveniently located gage 448.

Pressure fluid in the high-pressure system passes to the cylinder 84 ofthepad at the loading station, through the pipe I56 (Fig. the valve I58,and the pipes I66 and I05; and to the cylinders of the three pads awayfrom the load n station, through a pipe 450 which branches oil from thepipe I56 (Figs. 5 and 10), a check valve 452, and a riser pipe 454located in the center of the stationary post I6, thence up to threepassageways 456 which open on to chambers I66 in the manifold, whencethe pressure fluid passes to the aforementioned cylinders.

The chambers I66 are separated by partitions 458a-which control the flowof the pressure fluid to the cylinders in the following manner: Afterpressure has been applied to a shoe at the loading station-by pressurefluid supplied through the riser pipe I62, the turret is rotated to movethat shoe,away from the loading station. During the.

initial part of this rotation the partition 458 A two-way valveimmediately to the left of the port I64, as viewed in Fig. 5, moves pastthat port shutting ofl the riser pipe I62 from the cylinder 84, which ismoving away from the loading station. As the riser pipe I62 is shut oil,the partition 458 which forms the other end of the chamber I66 uncoversthe adjacent passageway 456, which is connected to the riser pipe 454that is also connected with the pump I56. The second and thirdpassageways 456 are connected to the chamber I66 in a like manner duringthe two following indexing operations. Thus, the cylinder 84 iscontinuousl connected with the pressure fluid supply as it moves fromthe loading station about the machine and to the station immediately tothe left of the loading station. The check valve 452 in the line 450leading to the riser pipe 454 shuts ofi automatically when the pressuredrops in the line I56 while the cylinder 84 at the loading station isbeing filled and in this manner prevents fluctuations in the pressureapplied to the shoes that are not at the loading station.

When the machine is operated a'fourth time to move the shoe back to theloading station, the rear partition 458 moves past the left passageway456 (Fig. 5) while the front partition uncovers the passageway I64. Whenthe port I64 is closed by the front partition 458, the cam 264 strikesthe lever 3III and moves the valve I58 to its exhaust position. Thisallows the pressure fluid in the cylinder 84 associated with the padmoving to-the loading station to escape when the front partitionuncovers the port I64, and the springs I28 to move the balls away fromthe shoe on that pad so that the shoe can readiliy be removed when itreaches the loading sta- When the pressure exceeds the setting of thepressure control valve 2I8 (Fig. 10), that valve opens and the pressurefluid passes through the pipe 220 to the second pressure control valve222 which controls the pressure in the low-pressure system. The valve222 is set to release under pressures in the neighborhood of to poundsper square inch, and when the pressure for which it is set is exceeded,the valve opens,

allowing the pressure fluid to flow back to the reservoir. The valve 222is controlled by a hand wheel 464 (Fig. 5) and the pressure in thelowpressure system is indicated on a gage 466. From the pipe 220 thepressure fluid flows through pipes 334 and 358 to the cylinders of thefluid motor and controls the turret in a manner which has already beendescribed.

Mounted on the rear of the base I0 (Fig. 1) is an electric motor 468which drives the pump I50 through a pulley 410 fastened to the motorshaft "I, a belt. 412, and a pulley 414 connected to the pump shaft 415.The motor is controlled by a push button switch 416 fastened to themachine frame adjacent to the loading station in a location convenientto the operator. The sides of the machine are closed by swinging plates418 pivoted on vertical posts 480 which are mounted on lugs 482 that jutout from the base wall I2.

Having described the construction of the illustrated machine, itsoperation will now be explained with particular reference to Figs. 2, 3and 10. The operator first places a sole on the pad I65 at the loadingstation and then depresses the treadle I10 which moves the valve I16 toits inlet position where it admits pressure fluid to the cylinder 266.This causes the plunger 2I8 to operate the sole locating mechanism andcause the latter correctly to position the sole on the pad.

He then places a shoe upon the sole and locates the same with respect tothe sole with the aid of gages providedfor that purpose, after which hemoves the bails Ill above the shoe. The treadle I" is then depressed tomove the valve I58 to the inlet position where it admits pressure fluidto the-cylinder 84 underlying the pad at the loading station, whichcauses the bails Ill to press the shoe into the pad. When the pressurein the cylinder 84 has built up to a predetermined point, it .depressesthe plunger 2" which strikes the valve I16 and moves it to its exhaustposition, allowing the pressure fluid that had lifted the plunger 2"] toescape. This permits the spring 2|! to move the plunger Ill downwardlyand the spring 256 to withdraw the locating mechanism {rpm the shoe andsole.

Having applied pressure to the shoe on the pad at the loading station,the operator depresses the hand lever 350, partly withdrawing the slidevalve 34. from the notch"! in the indexing cam 368 and initiatesrotation of the turret. As the turret rotates, the slide valveis firstforced back by the cam. 368, increasing the speed of rotation of the'turret, and is then allowed to move inwardly again as the notch 36Sassociated with the pad moving to the loading station approaches theindexing pin, thereby slowing down the movement of theturret until theindexing pin drops into the notch, when the movement is completelystopped. In the early part of the movement of the turret, the chamber I66 associated with the cylinder 84 beneath the pad moving toward theloading station uncovers the port I64, at which time the cam 284' (Fig.5) associated with that pad strikes the roller 3 on the bell-crank leverill and moves the valve I" to its exhaust position. This allows thepressure fluid in the cylinder 84 to escape back to the reservoir andthe heavy springs I2! to lift the bails from the shoe so that theoperator can take the shoe from the pad without delay when it arrives atthe loading station.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. In a shoe machine, a conveyor, a plurality of work receiving units onsaid conveyor, and a multicylinder fluid motor arranged to operate saidconveyor and directly connected thereto.

2. In a shoe machine, a conveyor, a plurality of work receiving units onsaid conveyor, and a multicylinder fluid motor movable with saidconveyor and arranged to operate the conveyor step by step. v

3. In a shoe machine, a conveyor, a plurality of work receiving units onsaid conveyor, aefixed abutment associated with the conveyor, and afluid motor movable with the conveyor and so connected to the abutmentthat theconveyor is operated by the reaction of the fluid motor againstthe abutment. v

4. In a shoe machine, a conveyor, a plurality of work receiving units onsaid conveyor, an abutment associated with the conveyor, a multicylinderfluid motor mounted on the conveyor and connected with the abutment, andmeans for rendering the cylinders sequentially effective to reactagainst the abutment and thereby to operate the conveyor.

' stationary post having fluid'conducting passages,

a turret having a sleeve rotatable on the post, a portion of said sleevecomprising a manifold and having chambers opening onto the passages-inthe post,-a fluid motor for rotating the turret. step by step, andmeans'for connecting the manifold to the fluid motor.

9. In a machine for operating upon shoes, a stationary post having fluidconducting passages, a turret including a sleeve rotatably mounted on vthe post, a portion of said sleeve comprising a manifold having chambersopening onto the pas-q sages in the post, afluid' motor mounted on theturret and arranged to rotate the turret, and

means for connecting the manifold with the fluid motor. I

10. In a machine for operating on shoes, a turret mounted for rotation,a fluid motor for rotating the turret, said fluid motor being arrangedfor movement with the turret, means for con? trolling the fluid motor,:an indexingpln operatively associated with said means, and a camconnected with the/turret for movement therewith, said cam havingnotchesfor-the reception of -the indexing pin when the turret reaches apredetermined position.

11. In a'machine for operating upon shoes, a rotatable turret having aplurality of. work receiving units, a fluid motor for moving the turretstep by step successively to bring the units to a loading station, avalve for controlling the fluid motor, an indexing pin operativelyassociated with the valve, and acam connected with the turret,- said camhaving notches located in predetermined relation to said units an thereception of the indexing pin when the units reach the loading station.

- 12. In a shoe machine, a conveyor, a plurality of work receiving unitson said conveyor, a fluid motor for operating the conveyor, and meansfor regulating the exhaust of the pressure medium from the fluid motorto control its operation.

13. In a shoe machine, a, conveyor, a plurality of work receiving unitson said conveyor, a multicylinder fluid motor for operating theconveyor,

and means for selectively regulating the exhaust or the pressure mediumfrom the cylinders to control the operation of the motor.

14. In a shoe machine, a conveyor, a plurality of work receiving unitson said'conveyor, a multicylinder fluidmotorfor moving said conveyorstep by step successively to move the units to a loading station, apressure line, a manifold arranged successively to connect the cylindersto the pressure line, an exhaust line connected with said manifold, themanifold beingarranged to connect the exhaust line to the cylinder oppo-5. In a machine for'operating upon shoes, a

6. In a machine for operatingupon shoes, 8.

site to the one connected to the pressure line, and

a valve for controlling the exhaust of the pressure fluid from thecylinder connected to the exhaust line.

15. In a shoe machine, a conveyor, a plurality,

of WQl'k receiving units on said c0nvey0r,-a multicylinder fluid motorfor operating said conveyor step by step successively to move the unitsto a loading station, and means for applying equal pressure to all ofthe cylinders when the conveyor is at rest.

6. In a shoe machine, a conveyor, a plurality of work receiving units onsaid conveyor, a multicylinder fluid motor for moving said conveyor stepby step successively to bring the units to a loading station, a manifoldassociated with the cylinders, a pressure line and an exhaust lineconnected with said manifold for selective connection with the cylindersof the motor, and a valve connected to the exhaust line and to thepressure line, said valve being arranged to control the speed of themotor by regulating the exhaust of the pressure fluid from the cylinderin exhaust position and when the machine is at rest to admit pressurefluid to the cylinder in exhaust position, thereby to equalize thepressure in all cylinders.

17. In a shoe machine, a conveyor, a plurality of work receiving unitson the conveyor, fluid operated means for moving said conveyor step bystep successively to bring the units to a loading station, a valve forcontrolling the operation.

of the fluid operated means, and a cam associated with said conveyor andarranged to regulate the position of the valve.

18. In a shoe machine, a conveyor, a plurality of work receiving unitson the conveyor, a fluid motor for moving the conveyor step by stepsuccessively to bring the units to a loading station. a fluid system forsupplying pressure fluid to the motor, a valve for controlling the flowof pressure fluid in said system, and a cam associated with the conveyorand arranged to regulate the position of the valve.

19. In a shoe machine, a conveyor, a plurality of work receiving unitson said conveyor, fluid operated means mounted on the conveyor andarranged to move the conveyor step by step successively to bring theunits to a loading station, a valve for controlling the operation of thefluid operated means, and a cam movable with the conveyor and arrangedto regulate the position of the valve during the operation of theconveyor.

20. In a shoe machine, a conveyor, a plurality of work receiving unitson said conveyor, fluid operated means for moving the conveyor step bystep successively to bring the units to a loading station, a valve forregulating the fluid operated means during the operation of theconveyor, a cam operatively connected with the conveyor and arranged forsliding engagement with the valve, and means for holding the valve inengagement with the cam.

21. In a shoe machine, a conveyor, a plurality of work receiving units,on said conveyor, fluid operated means for moving said conveyor step bystep successively to bring the units to a. loading station, a cammovable with said conveyor and having notches arranged successively toreach a predetermined position when the units reach the loading station,a valve for controlling the fluid operated means, said valve beingarranged to seat in the notch in the predetermined position when theconveyor is at rest and to function as an indexing pin.

22. In a shoe machine, a conveyor, a plurality of work receiving unitson said conveyor, a notched cam movable with the conveyor, fluidoperated means for moving said conveyor step by step successively tobring the units to a loading station, a valve for controlling the fluidoperated means, said valve being arranged to seat successively in thenotches in the cam between the movements of the conveyor, and means forpartly withdrawing the valve from the notch in which it is seated toinitiate the operation of the conveyor, said cam having surfacesarranged to increase the opening of the valve after the movement of theconveyor has been initiated to increase the speed of the conveyormovement.

23. In a shoe machine, a conveyor, a plurality of work receiving unitson said conveyor, fluid operated means for moving the conveyor step bystep successively to bring the units to a. loading station, a valve forcontrolling the fluid operated means, a cam having spaced notches inwhich the valve successively seats between the operations of theconveyor, said cam having surfaces arranged to regulate the position ofthe valve during'the operation of the conveyor and nearly to close thevalve near the end of each operation, the valve being arranged at thistime to restrict the flow of the pressure fluid from the fluid operatedmeans and thereby to reduce the speed of the conveyor.

24. In a shoe machine, a conveyor, a plurality I of work receiving unitson said conveyor, fluid operated means for moving the conveyor step bystep successively to bring the units to a loading station, a valve forcontrolling the fluid operated means, a cam arranged for cooperativeengagement with the valve, the cam having spaced notches arranged toreceive a portion of th valve while the conveyor is at rest and surfacesarranged to regulate the operation of the valve during the movement ofthe conveyor,'said surfaces being arranged to fully open the valveduring the early part of each operation of the conveyor thereby to movethe conveyor at a maximum speed and then to allow the valve nearly toclose as the next notch approaches thereby to slow down the speed of theconveyor.

25. In a shoe machine, a conveyor, a plurality of work receiving unitson the conveyor, fluid operated means for moving the conveyor step bystep successively to bring the units to a loading station, a fluidsystem for supplying pressure fluid to the fluid operated means, a valvefor controlling the flow of pressure fluid in said system, said valvebeing adapted to register with a restricted oriflce when moved to apredetermined position and reduce the flow of the pressure fluid, and acam associated with the conveyor and-arranged to control the valveduring the movement of the conveyor and to locate the valve at thepredetermined position near the end of the movement of the conveyorthereby to reduce the speed of the conveyor.

26. In a machine for operating on shoes, the combination of a rotatableturret, a fluid motor for operating said turret step by step, a valvefor controlling the operation of the fluid motor, and a cam mounted onthe turret in cooperative relation with the valve, the cam having aplurality of spaced notches for the reception of a portion of the valvewhen the turret is at rest and valve operating surfaces between thenotches, each of the surfaces comprising an abruptly sloped portion onthe advancing side of the notch arranged to open the valve wide at thebeginning of the rotation of the turret to cause the turret to move at amaximum speed, a portion of uniform radius extending from the abruptlysloped portion to the vicinity of the next notch in the advancindirection of the cam. and a por- ,motor, a cam associated with the valveand havtion of diminishing radius adjacent to the next notch.

27. In ashoe machine, a conveyor, a plurality of work receiving units onthe conveyor, a fluid motor for moving said conveyor step by stepsuccessively to bring the units to a loading station,

a valve arranged to control the exhaust of pressure fluidirom saidmotor, and a cam associated with said conveyor for regulating theposition of the valve. 28. In a shoe machine, a conveyor, a plurality ofwork receiving units on the conveyor,'a multicylinder fluid motormovablewith the conveyor and arranged to move the conveyor step by stepsuccessively to bring the units to a loading station, a valve forregulating the exhaust or the pressure medium from the fluid motor tocontrol its operation, and a cam movable with the conveyor and arrangedto control the position 01' the valve during the operation or theconveyor.

29. In a machine for applying pressure to shoe bottoms, a rotatableturret, a plurality of pressure applying units on said turret, a fluidmotor ing spaced notches arranged successively to refor rotating theturret to bring the units successively to a loading station, -a notchedcam movable with the turret, a combined valve and indexing pinassociated with said cam, said combined valve and indexing pin being.arranged to render the fluid motor inoperative when seated in a notchedportion 01' the cam and to control. 7 the operation 01' the motor whenin engfiflqment .with a surface of the cam between successive notches.

30. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units on said conveyor, means foroperating the conveyor to bring the units successively to a loadingstation, a displaceable devicei'or controlling the operation of theconveyor operating means, a cam associated with the conveyor forcontrolling the position of the device during ,theoperation of theconveyor, said cam having notches arranged for the reception of aportion of the device when the conveyor is at rest, means for applyingpressure to the unit at the load- .ing station, and means responsive tothe pres- -sure in said unit arranged partly to withdraw the device fromthe notch .in which it is seated when the pressure in the unit at theloading station reaches a predetermined level, thereby to initiatemovement of the. conveyor.

31. In a machine for applying pressure to shoe bottoms, a rotatableturret, a plurality of fluid operated pressure applying units on saidturret,

a fluid motor for operating the conveyor to bring the units successivelyto a loading station, a valve for'controlling the operation of a fluidmotor, a cam mounted on said turret and arranged to control the positionof the valve during the movement of the turret, said cam having notches,located in a predetermined relation to the'units" and arranged for thereception of a portion or the valve when the turret is stationary, apiston connected with said valve, means for applying ,ceive the valvewhen the conveyor is at rest, the

valve being arranged to' stop the operation of .the fluidmotor whenseated in the notches,

means for urging the valve toward the cam, and means for assisting theoperator in moving the valve from the notch inlwhich it is seated to im-10 thenext operation oi the fluid motor.

33. In -a shoe machine, a conveyor, a plurality of work receiving unitson said conveyor, a fluid motor for moving the conveyor step by step.successivelyto bring the units to a loading statiofi, avalve i'orco'ntrolling'the operation of the fluid motor, an indexing pin connectedwith said valve. a cam associated with the conveyor and having notchesarranged successively. to receive the indexing pin when the conveyorisat rest, said valve being constructed and arranged to stop the motorwhen the indexing pin is seated in Y the notches, and means associatedwith the work receiving unit 'at the loading station and. ar-

ranged automatically to withdraw the indexing pin from the notch inwhich it is seated when the work is flxed to the work receiving unit.

34. .In a machine for operating on shoes, a turret mounted for rotation,said turret having. a

plurality of work receiving units, a motor for rotating said turret,step by step successively to bring the unitsto a loading station, ashiftable member for controlling the operation of the motor, and meansfor urging the shiftable member toward a position where it initiates theoperation of the motor, said means being associated with theinstrumentalities of the work receiving unit at the loading station andeifective when a work piece is fixed to that unit.

35. In a machine for operating on shoes, a turret mounted for rotation,said turret having a plurality of work receiving units, a fluid motorfor rotating the turret step by step successively to bring the units toa loading station, an indexing pin, a notchedmember mounted on theturret andarranged for engagement by the in- P dexing pin while theturret is at rest, means for urging the valve toward the notched member,and fluid operated means arranged to assist the operator to withdraw theindexing pin from a notch in said member to initiate the .operation ofthe turret, said fluid operated means comprising a cylinder connected tothe pressure fluid source, a piston in the cylinder and connectionsbetween the piston and indexing pin.

36. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried by the conveyor, means foroperating the conveyor step by step successively to bring each unit to aloading station, means .ior, applying pressure to the pressure applyingunit at the loading station, and means operative when the pressure'onthe pressure applying unit at the loading station reaches apredetermined level for initiating the operation of theconveyorvoperating means.

37. In a machine for applying pressure to shoe bottoms, a conveyor,aplurality of pressure applying units carried by'the'conveyor, means foroperating the conveyor step by step successively to bring each unit to aloading station, and fluid means responsive to the pressure in thepressure applying unit at the loading station for initiating theoperation of the conveyor operating means when the pressure in the unitat the loading station reaches a predeterminedlevel.

38. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of fluid operated pressure applying units carried by theconveyor, means [or operating the conveyor step by step successively tobring each unit to a loading station, fluid operated means for applyingpressure to the pressure applying unit at the loading station, and meansoperative when the pressure on the fluid operated pressure applying unitat the loading station reaches a predetermined level for initiating theoperation of the conveyor operating means.

39. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried by the conveyor, fluidoperated means for moving the conveyor step by step successively tobring each unit to a loading station, means for applying pressure to thepressure applying unit at the loading station, and means operative whenthe pressure in the pressure ap plying unit at the loading stationreaches a predetermined level for initiating the operation of the fluidoperated means.

40. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of fluid operated pressure applying units carried by the con-.

veyor, fluid operated means for moving the conveyor step by stepsuccessively to bring each unit to a loading station, fluid pressuremeans for applying pressure to thepressure applying unit at the loadingstation, and means controlled by the fluid pressure in the pressureapplying unit at the loading station for initiating the operation of thefluid operated conveyor moving means when the pressure in the unit atthe loading station reaches a predetermined level.

41. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried by the conveyor, a motorfor moving the conveyor step by step successively to bring each unit toa loading station, means for initiating the operation of the motor,means for applying pressure to the pressure applying unit at the loadingstation, and means responsive to the pressure in the pressure applyingunit at the loading station for actuating the motor initiating means.

42. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried by the conveyor, a motorfor moving the conveyor step by step successively to bring each unit toa loading station, means for applying pressure to the pressure applyingunit at the loading station, a displaceable member for initiating theoperation of the motor, and means controlled by the pressure in the unitat the loading station for displacing said member.

43. In a machine for apply ng pressure to shoe bottoms, a conveyor, aplurality of pressure applyin units carried by the conveyor, a motor formoving the conveyor step by step successively to bring each unit to aloading station, fluid means for applying pressure to the pressureapplying unit at the loading station, a dlsplaceable member forinitiating the operation of the motor, a cylinder having a pistonoperatively connected with the displaceable member, and means forconnecting the cylinder with said fluid means so that the pressure fluidacting on the piston urgesthe displaceable member toward its motoroperating position.

44. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality oi. pressure applying units carried by the conveyor, a fluidmotor for operating the conveyor step by step successively to bring eachunit to a loading sta tion, means for applying pressure to the pressureapplying-unit at the loading station, a valve for initiating theoperation of the fluid motor, and means responsive to the pressure inthe unit at the loading station for moving the valve to its motoroperating position. 1

45. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried by the conveyor, a fluidmotor for operating the conveyor step by step successively to bring eachunit to a loading station, fluid means for applying pressure to thepressure applying unit at the loading station, a valve for initiatingthe operation of the fluid motor, and a piston controlled by the fluidmeans acting on the unit at the loading station for moving said valve toits motor operating position when the pressure in the unit reaches apredetermined level.

46. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of fluid operated pressure applying units carried by theconveyor, means for operating the conveyor step by step successively tobring each of the units to a loading station, a control for saidconveyor operating means, a displaceable member for operating thecontrol, means for conducting pressure fluid to the unit at the loadingstation, and means connected with -the pressure fluid conducting meansfor subjecting the displaceable member to the action of the pressurefluid, said last named means including a valve arranged to allow thepassage of pressure fluid to the displaceable member only when thepressure in the unit at the loading station reaches a predeterminedlevel.

4'7. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of fluid operated pressure applying units carried by theconveyor, means for operating the conveyor step by step successively tobring each unit to a loading station, a control for said-conveyoroperating means, a cylinder having a piston connected with said control,means for conducting pressure fluid P to the unit at the loadingstation, a conduit for connecting the pressure fluid conducting meanswith the cylinder, and a pressure control valve in said conduit arrangedto preventthe flow of pressure fluid to the cylinder until the pressurein the unit at the loading station reaches a predetermined level.

48. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of fluid operated pressure applying units carried by theconveyor, a fluid motor for operating the conveyor step by stepsuccessively to bring each unit to aloading station, a valve forcontrolling the operation of the fluid motor, a conduit for conductingpressure fluid to the unit at the loading station, a piston foroperating the motor controlling valve, said piston being arranged foroperation by the pressure fluid acting on the unit at the loadingstation, and a pressure con trol valve for controlling the applicationof pressure to said piston.

49. In a machine for applying pressure to shoe bottoms, a rotatableturret, a plurality of fluid operated pressure applying units carried bysaid turret, a multicylinder fluid motor arranged to rotate said turret,a valve for controlling the operation of the fluid motor by controllingthe exhaust from selected cylinders, a piston operatively connected withsaid valve, a conduit connecting the unit at the loading station with afluid-pressure source, and means for subjecting the piston to .theaction of the pressure fluid 'in the conduit, said means including apressure control valve arranged to open and permit the passage ofpressure fluid to the piston only after pressure in the unit at theloading station means. a displaceable member for operating the controLmeans for conducting pressure fluid to the unit at the loading station,and means connected with the pressure fluid conducting means forsubjecting the displaceable member to the action or the pressure fluid,said last-named means including a valve having a spring biased memberarranged toshut oil the flow of pressure fluid toward the displaceablemember when the pressure in the unit at the loading station reaches apredetermined level.

51. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of fluid operated pressure applying units carried by theconveyor, .neans for operating the conveyor step by step successively tobring each unit to a loading station, a control for said conveyoroperating means,

a cylinder having a piston .connected with said control, means forconducting pressure fluid to the unit at the loading station, a conduitfor connecting the pressure fluid conducting means with the cylinder,and a valve in said conduit having a spring biased member arranged toclose the valve when the pressure in the unit at the loading stationreaches a predetermined level.

52. In a machine'forapplying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried by'said conveyor, means formoving the conveyor to bring the units successively to a loadingstation, a hydraulic system for ap; lying pressure Ito the unit at theloading station, and a second hydraulic system for operating theconveyor moving means, the second hydraulic system being arranged tooperate at a difierent' pressure level than the first-mentionedhydraulic system.

53. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried :by said conveyor, meansfor moving the conveyor to bring the units successively to a loadingstation, a high pressure hydraulic system for applying pressure to theunit at the loading station, and a relatively low pressure hydraulicsystem for operating the conveyor moving means.

54. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried by said conveyor, means formoving the conveyor to bring the units successively to a loadingstation, a hydraulic system for applying pressure to the unit at theloadin station, a second hydraulic system ior operating the conveyormoving means, said second hydraulic system being arranged to operate ata different pressure level than the first-mentioned hydraulic system,and a valve arranged to admit pressure fluid to the lower pressurehydraulic sys tem only when the pressure in the higher pressurehydraulic system reaches ,a predetermined level.

.55. ,In a machine for applying pressure to shoe draulic system onlywhen the pressure in the high pressure system exceeds a predeterminedlevel.

56. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried by said conveyor, means formoving the conveyor to bring the units successively to a loadingstation, a high pressure hydraulic system for applying pressure to theunit at the loading station, a relatively low pressure hydraulic systemfor operating the conveyor movingmeans, a pressure control valve foradmitting pressure fluid to the low pressure hydraulic system from thehigh pressure system only when the pressure in the high pressure systemreaches a predetermined level, and a valve connected into the lowpressure hydraulic system and arranged to permit the escape oi pressurefluid from the 'low pressure hydraulic system when the pressure exceedsa predetermined level in. that system.

57. Ina machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried by said conveyor, means formoving the conveyor to bring th units successively to a loading station,a hydraulic system for applying pressure to the unit at the loadingstation, a second hydraulic system for operating the conveyor movingmeans, the second hydraulic system being arranged to operate at adiirerent pressure level than the first-mentioned hydraulic system, avalve inthe second hydraulic system for controlling the operationof'ithe comteyor moving means, and means responsive to the pressure inthe first hydraulic system for urging said valve toward a position whereit initiates the movement of the conveyor.

58. In a machine for applying pressure to shoe bottoms, a conveyor, aplurality of pressure applying units carried by said conveyor, means formoving the. conveyor'to bring the units successively to a loadingstation, a hydraulic system for applying pressure to the unit at theloading station, a second hydraulic system for operating the conveyormoving means, the second hydraulic system being arranged to operate at alower pressure level than the first-mentioned hydraulic sively to aloading station. a high, pressure b a I draulic system for applyingpressur to th unit Y at the loading station, a relatively: low pressurehydraulic system for operating the conveyormoving means, a valve in thelow-pressure system for controlling the movement or the conveyor, acylinder havingn piston operatively connected with said valve, saidcylinder being connected with the hish pressure system so that thepressure in the "high pressure system urges the piston in a direction tomove the valve to a posi- I

